產品簡介

Brief introduction to the products

SVC型低壓無功自動補償裝置主要用于戶內和戶外電力變壓器低壓側的無功功率補償。由電容器、濾波電抗器、接觸器、復合開關、熔斷器、功率因數自動控制器、主開關、通風系統及柜體組成。它對提高系統電壓水平、降低線路損耗、改善系統功率因數、提高電力變壓器的利用率、增強系統電壓穩定性起著十分重要的作用。具有響應及時迅速、運行無功耗、并有效地抑制合閘涌流，提高了無功補償裝置的運行安全性能。本裝置還具有過壓、欠壓、過流、短路、缺相等保護功能，并可顯示三相電壓、電流、有功功率、無功功率、功率因數、控制參數等。廣泛適用于住宅小區、工礦、企業、醫療，科研、油煤田、石化及其它公用設施，特別是電焊機、點焊機、吊車等大功率且啟動頻繁的工業設備。

SVC Low-Voltage Reactive Power Automatic Compensation Device is mainly used for the reactive power compensation at the low-voltage side of the indoor and outdoor power transformer and is composed of condenser, filter reactor, contactor, combination switch, fuse, power factor automatic controller, main switch, ventilation system and cabinet. It plays an important part in improving the system voltage level, reducing the loss of the lines, improving the power factor of the system, improving the utilization ratio of the power transformer and enhancing the stability of the system voltage. It is characterized by its rapid and timely response, no power consumption operation and effectively suppressing the switching on surging current to improve the operation safety performance of the reactive power compensation device. The device also has the protection functions of over voltage, under voltage, over current, short circuit and lack-phase and can display three-phase voltage, current, active power, reactive power, power factor and control parameters, etc.. It is widely used in residential quarters, industrial and mining enterprises, hospitals, scientific research, coal and oil fields, petrochemistry and other public facilities, especially electric welder, spot welding machine, cranes and other high power industrial equipment which starts frequently.

產品引用標準

Standards for Product

IEC-4931《低壓成套開關設備和控制設備》

GB7251《低壓成套開關設備》

GB/T15576《低壓無功功率靜態補償裝置總技術條件》

IEC-4931 Low Voltage Whole Set Switchgear and Controlgear

GB7251 Low Voltage Whole Set Switchgear

GB/T15576 General Technical Conditions of Low Voltage Reactive Power Steady Compensation Device

結構特點及功能

Structural Characteristics and Function

★補償精度高

補償后的系統功率因數優于0.98~0.99（或設計值）。

★響應速度快

對于50Hz電網，系統響應時間不超過4ms，完成一次投切過程不超過20ms，投切頻率隨用戶用電負荷的變化而實現動態補償（可達50次/秒）。

★投切無“污染”

可控硅組采用進口可控硅芯片，投切過程采用零電位技術。電容投切實現過零檢測，零電壓投、零電壓切，投切過程中無浪涌電流，無電壓沖擊，不產生高次諧波，工作安全可靠，使用壽命長，保證系統安全供電。

★三相不對稱補償功能

用戶用電負荷不平衡時，根據每相實際需要而定量投入，達到最佳補償效果。

★濾波回路

RC吸收回路濾除高次諧波，實現無投切振蕩，無補償呆區。

★控制器全自動檢測、運行

控制器具有檢測自動跟蹤、過電壓封鎖、缺相保護、欠壓保護及輸出端短路等線路故障保護功能，當系統電壓過高或過低時，控制器自動退出運行?？刂破鳠o故障運行時間不低于12年。

★數據通訊

具有RS232/RS485物理通訊接口，通訊方式可采用現場采集（點對點）或遠程采集（網絡）。

★溫控保護

當裝置溫度超過40℃時，散熱裝置自動啟動，實行強制通風。

High Compensation Precision

The system power factor after compensation is higher than 0.98 ~ 0.99 (or the designed value).

Rapid Response

For 50Hz power grid, the system response time is less than 4 ms. The time for completion of a switching process is not more than 20 ms. Dynamic compensation should be achieved for the switching frequency depending on the change of power load (can up to 50 times/sec).

Switching Pollution-free

The group of silicon controlled adopts the imported silicon controlled chips, and the process of switching adopts the zero potential technology. The capacitor switching realizes the zero-crossing detection, zero voltage input and zero voltage switching. During the switching, there are no surge current, no voltage surge, and no high-order harmonics, with the safe and reliable operation and long service life to ensure the safety of power supply of the system.

Three-Phase Asymmetric Compensation Functions:

In case of the imbalance of the electrical load for users, quantitive input is made according to the actual needs of each phase to achieve the best compensation effect.

Filter Circuit

RC absorption circuit filters the high-order harmonics to realize the vibration without switching and dead zones without compensation.

Fully Automatic Detection and Operation of Controller

The controller has detection auto-tracking, over-voltage blocking, lack-phase protection, under voltage protection, short circuit of output terminal and line fault protection functions. When the system voltage is too high or too low, the controller will stop operation automatically. The trouble free operation time of the controller shall be not less than 12 years.

Data Communication

It has RS232/RS485 physical communication interface. The communication means can adopt on-the-spot data collection (point to point) or the remote data collection (network).

Temperature Control Protection

When the device temperature exceeds 40℃, the heat sink will automatically start to carry out mandatory ventilation.